6 COMMON ILIAC ARTERY. A. iliaca communis. It extends from the bifurcation of the descending aorta at L4 to its division into the internal and external iliac arteries in front of the sacroiliac joint. It gives off only insignificant branches. C

7 Internal iliac artery. A. iliaca interna. It begins at the division of the common iliac artery, passes into the lesser pelvis and reaches as far as the upper margin of the greater sciatic foramen. Its branches vary greatly. C

8 Iliolumbar artery. A. iliolumbalis. It passes beneath the psoas muscle and the internal iliac artery and into the iliac fossa. C

26 a Patent part. Pars patens. Portion of the fetal umbilical artery which does not become obliterated postnatally. It gives off the vessels listed below.

27 Artery ofductus deferens. A. ductus deferentis. It descends in the pelvis up to the base of the bladder. From there downward, it accompanies the ductus deferens to eventually anastomose with the testicular artery. C

3 Vaginal branches (azygos arteries of vagina). Rami vaginales (aa. azygoi vaginae). Branches to the cervix that anastomose with vessels on the oposite side to supply the upper part of the vagina. A C

4 Ovarian branch. Ramus ovaricus. It runs along the ovarian ligament proper and through the me-sovarium to the ovary. It anastomoses with the ovarian artery and the tubal branch of the uterine artery. C

5 Tubal branch. Ramus tubarius (tubalis). It runs in the mesosalpinx of the tube to the point where it anastomoses with the ovarian artery. C

7 Middle rectal artery. A. rectalis media. It crosses the floor of the pelvis to the rectum and supplies the retal muscles. A E

7a Vaginal branches. [Rami vaginales]. Branches to the lower part of the vagina. A

8 Internal pudenal artery. A. pudenda interna. It passes through the greater sciatic foramen [[in-frapiriform]] from the pelvis and through the lesser sciatic foramen to the lateral wall of the ischiorectal fossa. A D E

9 Inferior rectal artery. A. rectalis inferior. It passes transversely through the ischiorectal fossa and supplies both sphincters as well as the skin below the anal valves. D E

10 Perineal artery. A. perinealis. It arises at the posterior margin of the urogenital diaphragm and supplies the bulbospongiosus and ischio- 29 cavernosus muscles. D E

13 Urethral artery. A. urethralis. It penetrates the corpus spongiosum at the junction of the crura of the penis and travels as far as the glans. It anastomoses with the dorsal and deep arteries of the penis. E

14 Artery of bulb of penis. A. bulbi penis. Besides the bulb of the penis, it also supplies the deep transversus perinei muscle and the bulbo-urethral gland. E

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